Each of the four nationwide cell phone carriers —and— is developing and testing 5G network technology. AT&T deployed America's first 5G mobile network in December. AT&T's next 5G cities including Minneapolis, Chicago, Las Vegas, Los Angeles, Nashville, Tennessee Orlando, Florida, San Diego, San Francisco and San Jose, California. That allows PCs, phones, and other internet-connected gadgets to take advantage of super-fast 5G speeds — but not connect to AT&T's 5G networks themselves. But T-Mobile's strategy means its 5G network will probably be slower than its rivals' because the spectrum T-Mobile plans on using for 5G is lower frequency.

Source: CNN February 25, 2019 20:26 UTC